X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=blobdiff_plain;f=fs%2Fdax.c;h=131fd35ae39d53f8a9ef7bdd1aaa61677beda5f0;hp=a86d3cc2b38941b0e39f23be84e4986d8852ae42;hb=fb952af46586ab123ac006248a7196afcf3323a8;hpb=446a34a35e9d79de7aabe6fe31035d31b1976ddf

diff --git a/fs/dax.c b/fs/dax.c
index a86d3cc2b389..131fd35ae39d 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -29,6 +29,11 @@
 #include <linux/uio.h>
 #include <linux/vmstat.h>
 
+/*
+ * dax_clear_blocks() is called from within transaction context from XFS,
+ * and hence this means the stack from this point must follow GFP_NOFS
+ * semantics for all operations.
+ */
 int dax_clear_blocks(struct inode *inode, sector_t block, long size)
 {
 	struct block_device *bdev = inode->i_sb->s_bdev;